OK, it turned out to be 30lbs a box. I went with 50 boxes even though I could have added more. So that is a total 1500lb load in the bed plus two people and a full tank of gas.
So as you can see by the photo the rear did sag a little, but it was not very noticable and I have seen much worse on other trucks. Below I added a detailed review of driving with this much weight. I will say I was extremely impressed overall, and was frankly a little shocked at how capable the RL was.
Engine/Drivetrain: I think this is was most supprised me. I don't know if it was the trans shifting different or the computer dialing in more aggressive engine setting, but right out of the gate the motor reponded as if there was no load. Just tip into the throttle and we were off, just like unloaded. I drove as normal, even up steep hills I did not feel like I was pushing more on the pedal. The only time I noticed any difference, was when I did a WOT pull, you could tell it was a little slower, but just barely. I bet it would have even been better with high octane.
Brakes: Another pleasant suprise. This truck has PLENTY of brakes. I felt like they performed the same as unloaded. More than enough stopping power and no problems handling the load.
Suspension/Handling: This is where I could tell there was a load in the bed, still overall I was very impressed. The steering felt a little light, and the ride was a little bouncier but very controlled. You could feel the high center of gravity with the truck leaning a little more. But there was not the side to side shifting that you get with leaf spring/solid axle trucks. It should be noted that I drove exactly the same as I normally would. Actually there were a few times were I forgot there was 1500lbs back there, I had to remind myself to slow down, thats how well it handled it.
Overall I am so impressed with this truck. I have owned 7 other trucks with the last being a F150 supercrew, and none of them would have handled this load as well as the RL did.
Oh yeah my RL has 116k on it and it driver like new. All I can say is wow!
